Tool holder for pneumatic hammers



May 9, 1939. c. P WHITLOCK TOOL HOLDER FOR PNEUMATIC HAMMERS Filed Oct. 13, 1936 C 1 1 (ha/7 INVENT R. @s P W/W/wi ATTORNEY.

Patented May 9, 193% UNITED STATES PATENT OFFICE 5 Claims.

My invention relates to a tool holder for pneumatic hammers, more particularly the type of pneumatic hammer of T shape where the handle extendsat right angles to the main body of the hammer and positioned substantially intermediate the ends such as the Seiden pneumatic hammer and the objects of my invention are:

First, to provide a tool holder to be used in connection with this type of pneumatic hammer for holding the various tools in position relatively to the hammer head;

.Second, to provide a holder of this class which may be readily attached to and disconnected from the conventional pneumatic hammer of this class;

Third, to provide a tool'holder of this class with means for holding the tool and preventing its losing out-of the holden'but still permits the proper reciprocal action of the tool;

Fourth, to provide a tool holder of this class with a plunger for engagement with the tool which is applicable for use with various types of tools which may be readily fitted to the holder;

Fifth, to provide a holder of this class which is adapted to fit various types of pneumatic hammers of the class described;

Sixth, to provide a holder of this class which is very simple and economical of construction, emcient in its action, and which will not readily deteriorate or get out of order.

.With these and other objects in View as will appear hereinafter my invention consists of certain novel features of construction, combination, and arrangement of parts and portions as will be hereinafter described in detail and particularly set forth in the appended claims, reference being had to the accompanying drawing and to the characters of reference thereon which form a part of this application in which:

Figure 1 is a sectional View from the line Il of Fig. 2 of my holder complete showing some of the parts and portions in elevation to facilitate the illustration and showing the holder positioned on a conventional pneumatic hammer and also showing by dotted lines a shifted position of the support 4 when starting to turn it to a position for removing the tool holdler; Fig. 2 is a fragmentary sectional view from the line 2-2 of Fig. 1 showing some of the parts and portions in elevation to facilitate the illustration; Fig. 3 is a fragmentary end view of one of the plunger supports shown in its relation with the plunger member when in position to be removed; Fig. 4 is a sectional view through 4-4 of Fig. 3 and Fig. 5 is a similar View to that of Fig. 3 with the support member in position when secured on the hammer.

Similar characters of reference referto similar parts and portions throughout the several views of the drawing:

The plunger member I, plunger member casing 2, plunger member casing cap 3, plunger member casing support 4, clamp member 5, and clamp screw 6 constitute the principal parts and portions of my tool holder for pneumatic tools.

The plunger member l is provided with a relatively fiat upper head portion la which is substantially the same diameter as the hammer head and adapted to be engaged thereby. It is provided with a tapered portion lb extending therefrom and with a small stem portion lc which is reci rocally mounted in the stem portion 2a of the plunger member casing 2. This casing member stem 2a is provided near the lower end with an external threaded portion 2!) which is adapted to receive a plunger member cap 3 which is internally threaded to fit thereon. This cap 3 is provided centrally with an opening 3a which is adapted to receive a reduced portion T-l of the tool T, and the tool T is also provided with an enlarged portion T-2 which is reciprocally mounted in the stem portion 2a of the casing 2.

The plunger member casing 2 is provided with an extended chambered portion which is of sufficient size and length to permit the free movement of the plunger head Id of the hammer head H--| and is provided with a downwardly tapered portion 2d which merges with the stem portion 2a. The upper end of the plunger member casing 2 is enlarged at 2e and it is provided in the upper endwith a recess 2f adapted to receive the end of the hammer and the end extends downwardly against a shoulder 2g as shown best in Figs. 1 and 2 of the drawing. This plunger member 2 is also provided with oppositely disposed buttons 22' which buttons are provided with reduced portions 2h which are preferably round.

In order to support the casing member 2 in position there is provided a support 4 which is an inverted U-shaped strip provided with slots 4a in the opposite ends. These slots 4a are of suflicient length and width to fit over the button portion 2i when the U-shaped member is in a position at right angles to the main axis of the plunger member casing 2 and then turned on the round reduced portion 2h and forms a latch for the member 4 when turned to a position so that its axis is paralleled with the main axis of the casing 2 as shown by solid lines in Fig. 1 of the drawing. This support 4. is provided with a reinforced portion 4?) which is screw threaded at 40 adapted to receive a screw 6 which is provided with a knurled head 6a. The opposite end of this screw 6 is provided with a reduced portion 611 and with a spaced head 60 and fitted around the portion 617 so as to swivel thereon is a clamp member 5 which is provided with a recess 5a which is adapted to fit over the extended portion H2 of the hammer H. This recess a is preferably hexagon shape adapted to fit the hex shape head H2 of the hammer as disclosed herein which is a conventional type of hammer known as Seiden pneumatic hammer.

The operation of my tool holder is as follows:

. The tool T is placed in the lower end of the stem 2a either by removing the cap 3 and putting it in from the cap end or putting it in from the opposite end with the cap in position. The plunger stem la is positioned in the stem 2a and the recess 20 as shown in Figs. 1 and 2 of the drawing. The member 4 is positioned slightly to one side as shown in Fig. 1 of the drawing for placing the member 2 in position on the hammer. Then the member 4 is shifted to the position shown by solid lines in Fig. 1 of the drawing and the screw 6 turned until the member 5 is clamped tightly over the upper end of the hammer as shown by solid lines in Fig. 1 of the drawing when the hammer is ready for use with the tool in position. If it is desired to use the hammer without the tool the screw 6 is unscrewed until the member 5 may be turned past the lug H2 on the hammer; then the member 4 is shifted to the dotted line position in Fig. l of the drawing and the tool holder may be readily removed by shifting it downwardly from the hammer head.

Though I have shown-anddescribed a particular construction, combination, and arrangement of parts and portions, I do not wish to be limited tothis particular construction, combination, and arrangement, but desire to include in the scope of my invention, the construction, combination, and arrangement substantially as set forth in the appended claims.

Having thus described my invention, what I claim as new and desire to secure byLe'tters Patent is:

1. In a tool holder for conventional pneumatic hammers a readily removable plunger casing provided with a recess at its upper end adapted to receive and fit the conventional pneumatic hammer around the hammer head at the plunger end and provided with a chamber at the upper end below said recess arranged to receive the hammer head and a reduced hollow stem portion at its lower end, a plunger with a stem portion adapted to reciprocate in the stem portion of said casing and provided with a head adapted to reciprocate in the chamber portion thereof and adapted to engage the head of the hammer, means for securing said casing against the hammer surrounding the hammer head, and a tool holding cap adjustably mounted on the extended end of said casing stem.

2. In a tool holder for conventional pneumatic hammers wherein there is no tool holder, the combination with said pneumatic hammer, of a readily connectable readily removable plunger casing provided with a recess'at its extreme upper end only adapted to receive and fit around the lower end' only of the conventional hammer head and provided with a'reduced chamber extending downwardly from said recess arranged to receive the hammer head, and a reduced relatively long slender hollow stem portion at its lower end, a plunger with a stem portion adapted to reciprocate in said stem portion of said casing and provided with a relatively large head adapted toreciprocate in said chamber portion and engage the lower surface of the head or the hammer.

3. In a tool holder for conventional pneumatic hammers wherein there is no tool holder, the combination with said pneumatic hammer, of a readily connectable readily removable plunger casing provided with a recess at its extreme upper end only adapted to receive and fit around the lower end only of the conventional hammer head and provided with a reduced chamber extending downwardly from said recess arranged to receive the hammer head, a reduced relatively long slender hollow stem portion at its lower end, a plunger with a stem portion adapted to reciprocate in said stem portion of said casing and provided with a relatively large head adapted to reciprocate in said chamber portion and engage the lower surface of the head of the han'nner, and means connected with said casing adapted to extend over the opposite end of the'hammer and clamp thereon for securing'said plunger casing rigidly in position.

4. In a tool holder for conventional pneumatic hammers wherein there is no tool holder, the combination with said pneumatic hammer, of a readily connectable readily removable plunger casing provided with a recess at its extreme upper end only adapted to receive and fit around the lower end only of the conventional hammer head and provided with a reduced chamber extending downwardly from said recess arranged to receive the hammer head, a reduced relatively long slender hollow stem portion at its lower end, a plunger with a stem portion adapted to reciprocate in said stem portion of said casing and provided with a relatively large head adapted to reciprocate in said chamber portion and engage the lower surface of the headof the hammer, means connected with said casing adapted to extend over the opposite end of the hammer and clamp thereon for securing said plunger casing rigidly in position, said securing means including an inverted U-shaped strip pivotally connected with said casing near one end 'of said hammer and adapted to fit over the opposite end of said hammer.

5. In a tool holder for conventional pneumatic hammers wherein there is no tool holder, the combination with said pneumatic hammer, of a readily connectable readily removable plunger casing provided with a recessat its extreme upper end only adapted to receive and fit around the lower end only of the conventional hammer head and provided with a reduced chamber extending downwardly from said recess arranged to receive the hammer head, a reduced relatively long slender hollow stem portion at its lower end, a plunger with a stem portion adapted to reciprocate in said stem portion of said casing and pro vided with a relatively large head adapted to reciprocate in said chamber portion and engage the lower surface of the head of the hammer, means connected with .said casing adapted to extend over the opposite end of the hammer and clamp thereon for securing said plunger casing rigidly in position, said securing means including an inverted U-shaped strip pivotally connected with said casing near one end of said hammer and adapted to fit over the opposite end of said hammer, and clamp means in connection with said strip at the opposite end of the hammer for clamping said strip and plunger casing rigidly on the hammer.

CHARLES P. WHITLOCK. 

